KR20140079795A - Prestressed glass roll - Google Patents

Abstract

The glass roll comprises at least one glass film and an intermediate material which are superposed on at least two layers on the winding core and the glass film layers are fixed to the glass roll by the intermediate material layers. The glass roll is produced by a method comprising the steps of: providing a glass film, a winding core and a compressible intermediate material; winding at least one inner layer of the intermediate material on the winding core; Winding a glass film and an intermediate material onto the winding core such that the layer is alternately placed on the winding core and the intermediate material and / or the glass film are wound with a tensile stress suitable for compressing the intermediate material, Securing to a glass roll.

Description

{PRESTRESSED GLASS ROLL}

The present invention relates to a glass roll comprising an intermediate material between a glass film wound on a winding core and individual glass film layers.

For various applications, for example in the field of consumer electronics, for example for semiconductor modules, for organic LED light sources or for cover glass for thin or curved display devices, or in the field of regenerative energy or energy technology, Thin glass is increasingly used. Examples of such are touch panels, capacitors, thin film batteries, flexible printed circuit boards, flexible OLEDs, flexible photovoltaic modules or e-papers. Thin glass can be used for many applications, such as chemical resistance, resistance to temperature, heat resistance, gas impermeability, high electrical insulation, controlled expansion coefficient, flexibility, high optical quality and light transmittance, or two thin Are becoming increasingly important due to their high surface quality with very low roughness due to the fire-polished surface of the glass surface. Here, the thin glass refers to a glass film having a thickness of less than about 1.2 mm and a thickness of not more than 15 m. The thin glass as the glass film is in a tendency to be rolled up after manufacture due to its flexibility and stored as a glass roll or transferred for fabrication or subsequent processing. In a roll to roll process, the glass film may be re-rolled up after intermediate processing, such as coating or making the surface, and supplied for subsequent use. Winding glass has the advantages of more economical and compact storage, transport and handling in subsequent machining compared to the storage and transfer of flat materials.

Glass has a low fracture strength as a brittle material with these excellent properties, because it has low resistance to tensile stress. When the glass is bent, a tensile stress is generated on the outer surface of the curved glass. For storage without breakage of glass rolls and for breakage-free transport, the quality and integrity of the edges that prevent the creation of cracks and breaks in the roll-up glass film first is important. Very small cracks, for example, damage at the edge, such as microcracks, can cause greater cracking or breakage in the glass film. In addition, due to the tensile stress on the top surface of the wound glass film, the integrity of the surface and scratches or non-scratches are important in order to prevent cracking or breakage in the roll-up glass film. Further, in order to prevent the generation of cracks or breakage in the rolled-up glass film, the withstand pressure in the glass due to manufacture should be as small as possible or not. Because the three factors in normal manufacture can only be optimized in a limited manner, the destructive sensitivity of these rolled-up glasses increases to the existing limits of their material properties. Therefore, for winding the glass film and for storing and transporting the glass roll, special measures and conditions are necessary to prevent damage to the glass.

Here, on the one hand, the vibration of individual or all glass film layers on the glass roll is a problem. On the other hand, the axial movement of the glass rolled up on the winding cores can cause damage. In addition, the relative, sideward axial movement between individual or all glass film layers, i.e., the glass film layers, is very critical. Since the glass film layers are stacked in a stepped manner, there is a protruding edge area very sensitive to breakage. This effect is manifested by the stretching material of the glass film layer or the glass roll. In this case, the area of one or more other glass film layers, which protrude particularly for the other glass film layers, can be broken or cracked, which can be supported by impact or contact from the outside or by vibration. That is, the protruding regions of the glass film are not protected in this state in the glass roll combination.

In addition, the granular inclusions between the glass film layers must be prevented from causing damage. On the one hand, the inclusions can scratch the surface, which is particularly supported by the movement between the glass film layers or by the relative movement of the glass film layers, or the inclusion causes cracking or breakage due to the generation of a point-like compressive load.

In order to prevent breakage of thin glass by contaminating particles between glass surfaces, WO 87/06626 proposes a method for coating a thin glass in a roll-to-roll process using a glass roll, One or more layers of non-abrasive material, for example a plastic film, are provided. The plastic film may be a polymer such as polyester or polyethylene and includes an embossed pattern to protect the metal coating or metal oxide coating on the glass. No solution is provided here for the problem of lateral movement or vibration of the glass film layers. No solution is provided in terms of the problem of the interaction between the glass surface or the coating surface and the intermediate layer material.

US 3,622,298 discloses the use of kraft paper as an intermediate layer between glass film layers in connection with the manufacture and roll-up of glass films, and has not recognized the problem of movement or vibration of the glass film layer, for example during transport.

US 3,089,801 discloses the use of kraft paper or aluminum film. Here, the paper is detachably adhered on a thin glass as a reinforcing material. Because of this, the glass is protected from breakage even during roll-up, as it gains greater strength in bending and handling. However, this measure does not prevent the possible causes of breakage of the glass film on the glass roll, for example, as caused by movement or vibration of the glass film layers during transport of the glass roll. In addition, the layer of bonded paper prevents the debris from falling off separately, but does not prevent the creation of cracks or breakage.

US 2011/0171417 discloses the lamination of thin glass between two plastic layers before rolling up to form a glass roll to protect the edges of the thin glass. A layer of a glued support is provided on one side of the thin glass, which protrudes past the edge of the thin glass. Since the cover layer is detachably adhered to the entire surface or only in the region of the edge and beyond the edge on the other side of the thin glass, the edges are laminated between the two plastic layers and then the thin glass is rolled up. US 3,089,801 does not provide a solution to prevent the possible causes of breakage of the glass film on the glass roll. The risk of breakage of the glass film in the separation of the adhesive interlayers is also a problem. The disadvantage of the above solution is the influence of the glass surface on the adhesive residue or adhesive of the adhesive.

WO 2010/038760 recognizes this problem and presents a lateral protrusion of the buffer arch between the glass film layers as a solution. The glass roll includes a winding core having flanges spaced apart from the roll-up glass. The laterally protruding buffer arch material prevents the edges of the rolled-up glass film from colliding with the flange to break when the entire glass roll is laterally moved on the winding core or when the side of the individual glass film layer is stretched or stretched between the glass film layers . Again, it is a disadvantage that no solution is proposed to prevent lateral movement of the glass film layer or glass on the winding core. As a result, breakage of the glass may occur despite the protruding buffer layer or intermediate layer when the glass roll is for example stretchable or the glass film layers are in a resonant oscillation state. Only a solution is provided in which the edges are separated from the flange upon movement. Further, the intermediate layers protruded when the glass roll is unwound can be caught by each other, and the glass edge is damaged by an unacceptable load.

US 2011/0200812 discloses forming a sleeve by rolling up a glass sheet or a glass film wherein an intermediate layer is inserted between the two layers of the glass film to prevent cracking in the glass film sleeve. The intermediate layer is used in US 2011/0200812 to prevent damage to the glass film and to absorb extreme pressure applied to the glass roll.

WO 2010/038760 A1 also discloses a glass roll in which the risk of breakage is reduced because the intermediate layer is inserted between individual glass layers. This publication also only initiates insertion of the intermediate layer to avoid damage.

WO 87/06626 discloses a glass roll provided with coatings on individual glass layers by sputtering which is a coating method to separate the surfaces of adjacent glass layers in a glass roll. The publication also discloses only the insertion of the intermediate layer to prevent surface contact and edge contact of adjacent glass layers in the sleeve. If the winding is loose, the glass layers may move laterally or oscillate with respect to each other.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a glass roll which eliminates the aforementioned disadvantages and prevents movement or vibration of the glass roll together with a great protection against roll-up glass.

This object is achieved by the features of claims 1 and 17 and claims 41 and 43. Preferred embodiments are given in dependent claims 2 to 16, 18 to 40 and 42. [

The glass roll comprises at least one glass film and an intermediate material, wherein the glass film and the intermediate material are superposed on at least two layers on the winding core, and the glass film layers are fixed by the intermediate material layer. The fixation herein refers to a force between the glass layers wound in the glass rolls such that the possibly straightened wound side of the sleeve when the force acts substantially transversely with respect to the winding direction is maintained as much as possible and the elastic material of the glass roll is preferably prevented .

The inventors have found that the movement between the glass layers, that is, the stretching of the glass roll, can be prevented because the friction inside the roll can be affected by the pre-stress of the glass sheet.

In a sleeve with n winding layers, a static friction coefficient μ appears between the layers and, when the radial force FR acts, the friction FF between the wound material and the core is:

The radial direction force FR corresponds to a pre-stress FV that can be set, for example, on the intermediate material when it is rolled. That is, FR = FV.

In order to prevent the sleeve from stretching, the friction must be greater than the weight acting on the sleeve. That is, FF> FG. Since the ratio of friction to total mass is the least desirable in the innermost glass film layer, the sleeve is usually broken in the innermost layer. The weight acting on the sleeve is expressed by the following equation:

In this formula,

FV pre-stress

FG weight

FR Radial Direction

FF friction (between wound material and core)

n Number of wound layers

b Glass material width

r Roll radius (core)

t1 Glass thickness

t2 intermediate layer thickness

μ static friction coefficient

PF surface pressure

AF working face

m Total mass of wound material

ρ glass density

g = 9.81 m / s ² g-force, g-acceleration

As shown in the equation, a relatively small preliminary stress FV = FR is required in order to prevent the stretching material of the roll.

By virtue of the inventors, according to the above formula, for each glass sheet,

b Glass material width

r Roll radius (core)

t1 Glass thickness

t2 intermediate layer thickness

μ static friction coefficient

ρ glass density

, The preliminary stress FV required to prevent the stretching material of the glass sleeve having n winding layers can be determined at the number n of predetermined winding layers.

The winding cores typically have a diameter of 200 to 600 mm and may be made of a stable material such as wood, plastic, cardboard, metal or composite material. The winding core may have a slip resistant and optionally compressible coating suitable for the surface or may have a structured surface.

The glass film is a continuous long sheet having a specific length, and in one glass roll, the glass films can have a single length or are wound on one roll in a plurality of short lengths. Typically, such glass films have a width in the range of 300 to 800 mm and a length of 200 to 1000 m. Such glass films are produced by the down-draw method or the over-flow-down-draw-fusion method in a known manner (see, for example, WO 02/051757 A2 for over- See WO 03/051783 A1). The formed and drawn infinite sheet is wound on one glass roll and lengthwise cut according to the specification.

The glass film may in this case consist of a suitable kind of glass, in particular borosilicate glass or aluminoborosilicate glass. To reduce risk of breakage and cracking during roll-up, the surface may be fire-polished and very smooth. As a result, the glass film can absorb larger tensile stress on the outer surface of the curved glass and can be bent to a smaller radius. According to the surface roughness, critical stress is given to the surface of each glass, and at the critical stress, the existing initial crack having a depth in the range of the surface roughness continuously moves independently to destroy the glass (brittle fracture). The thinner the glass, the smaller the stress on the surface due to the given bending radius. Thus, for example, a 100 micron thick glass film with a laser scribed edge may be formed around a radius of 50 millimeters without breakage, a 30 micron thick glass film around a 24 millimeter radius without breakage, The glass film can be wound around a radius of 12 mm without breakage. Further, a glass film having a thickness of 50 占 퐉 can be wound around a radius of 5 mm without breakage, and a radius of 2 mm is also possible. In particular, the thin drawing of the low-alkali glass has been shown to produce a particularly smooth surface, preferably in the thickness range of 15-30 [mu] m.

The winding of the glass sheet with a low breakage probability is provided in order to ensure the breakage-free winding of the thin glass, by means of suitable measures such as, for example, fire-protection, with few microcracks and low edge roughness.

The possibility of manufacturing a glass sleeve with a specific diameter is indicated by the breakage probability. That is, considering the glass sheet or a number of glass films having a length of 1000 m and a thickness in the range from 5 탆 to 350 탆, particularly from 15 탆 to 200 탆, the glass film has a thickness in the range of 50 mm to 1000 mm, Lt; RTI ID = 0.0 > 1%. ≪ / RTI >

Table 1 shows the edge strength, or stress, in MPa, caused by the roll-up of the glass film in roll radius, for different glass films.

The glass is Schott AG's glass AF32eco, D263Teco and MEMpax from Mainz. The stress? (MPa) is given according to the glass thickness d (占 퐉) and the diameter D (mm) of the wound glass roll. The equation for determining the edge strength, i. E. The stress on the outer surface of the glass sheet, is as follows:

           σ = E · y / r

Where y is the glass thickness of the glass sheet to be rolled up to d / 2 and r is the roll-up radius of the rolled up glass sheet.

Knowing the probability of failure for a number of samples to be analyzed, the value for σ in Table 1 can determine the breakage or failure probability P of a glass sheet having a specific length and roll radius. The breakage probability forms a wobble distribution, and the width of the distribution is characterized by a wobble-parameter.

According to the WIKIPEDIA-Encyclopedia, the quadratic distribution is a continuous probability distribution for a set of positive real numbers used to indicate the lifetime and frequency of breakage of brittle materials such as glass. And blanket distribution can be used to indicate the failure rate of the technical system. And blanket distributions are characterized by the width of the distribution, the so-called blanket coefficients. Generally, the larger the coefficient, the narrower the distribution.

When two-point bending measurements are made with a sample length of 50 mm, the probability of breakage of a glass sheet with length L is determined as follows:

In this formula,

P is the breakage probability of the glass sheet of length L in roll radius r,

L is the glass sheet length at which the breakage probability is determined,

l is the relevant sample length used in a two point test, preferably l = 50 mm,

σ (r) is the stress caused by the roll-up at roll radius r, μ is the stress determined by the two-point bending, and β is the bending modulus indicating the width of the distribution and hence the extension to small strength.

Allowance of breakage probability is to achieve a breakage probability of 1% (or smaller) at a roll-up length of 1000 m with a radius r of a glass sheet of thickness d and to achieve a breakage probability of 50% It makes it possible to establish the following conditional expression:

Given the stresses in Table 1 for [sigma] (r), the system is characterized and given the following equation as a parameter called "figure of merit &

Preferably, the value of alpha rises from, for example, 12 to 14.5 due to an increase in edge strength by a measure such as fire policy.

The wound glass film according to the invention is usually at most 350 μm, preferably at most 100 μm, more preferably at most 50 μm, particularly preferably at most 30 μm and at least 5 μm, preferably at least 10 μm, Has a thickness of at least 15 [mu] m. Here, such a thin glass film is preferably bent and wound to a small radius without problems due to its elasticity.

Preferred glass film thicknesses are 15, 25, 30, 35, 50, 55, 80, 100, 130, 160, 190, 280 탆.

The wound glass film according to the present invention may be applied to at least one surface of both sides thereof, preferably on both sides of the surface, and in some cases at least two opposing edges, Lt; / RTI >

The secondary average roughness (RMS) Rq is at most 1 nanometer, preferably at most 0.8 nanometer, more preferably at most 0.5 nanometer at the surface of at least one side of both sides thereof. The average surface roughness Ra is at most 2 nanometers, preferably at most 1.5 nanometers, particularly preferably at most 1 nanometer, for a measurement length of 670 mu m, at the surface of at least one side surface of both sides thereof. In a preferred embodiment, the surfaces on both sides of the glass film have the above illuminance values. In particular, the side surface of the glass film subjected to tensile stress at the wheel is characterized by the roughness value.

The smooth surface facilitates bending and roll-up of the glass film without risk of breakage due to tensile stress on the glass surface, but this facilitates lateral movement of the glass film layers in the glass roll or relative side movement of the glass film layers, Promotes lateral movement of the rolled up glass on the stretching material or winding core of the film layers, because the coefficient of friction of the glass surface is very small.

According to the invention this is prevented by the glass film layers being fixed on the glass roll by the intermediate material. The intermediate material covers each glass film layer at least partially, preferably entirely, on both sides in a roll-up state of the glass roll. In this case, at least one intermediate material layer is first wound on the winding core, on which the first glass film layer is placed, and then the intermediate material and the glass film are alternately rolled up. If the entire glass film length is wound, one or more layers of intermediate material are wound from the outside around the glass roll to fix the last glass film layer. The innermost or inner intermediate material layer, i.e. the contact layer between the winding core and the first glass film layer, can alternatively be formed of different materials or the winding core is coated with a fixing material. The last topmost or outer intermediate material layer or multiple layers of intermediate material may alternatively or additionally be formed of a layer made of, for example, a special outer protective film or paper and / or other material such as an adhesive sheet or a fixing sheet have. Here, in order to maintain the pressure of the inner intermediate layers, it is important that the uppermost glass film layer is securely fixed.

The intermediate material is wound in accordance with the present invention with a pre- or tensile stress of a magnitude to such an extent that the intermediate material is compressed, or subjected to a compressive load or stretched as required. In the roll-to-roll process, the glass film is wound with a specific pre-stress or tensile stress, which is of the order of magnitude to the extent that the intermediate material is compressed as required or subjected to a compressive load when rolled. Usually, a weak compression of the intermediate material is sufficient. By compression, a tight and compact sleeve unit of a glass film and an intermediate material is formed, which is generally sufficient for the glass film layers to be sufficiently fixed. The glass film layers are fixed by a compressed intermediate material.

In a preferred embodiment of the present invention, the intermediate material has an elastic force and exerts a restoring pressure with a corresponding relaxing force against the adjacent glass film surface in the compressed state. This results in a particularly secure fixation of the glass film layers. Here, the glass film layers are fixed by a compressed intermediate material, which applies a restoring pressure to the glass film layers.

The intermediate material interacts with the glass surface to have a certain static friction, which represents the degree of fixation of the glass film layers to movement. The static friction is increased by the restoring pressure or the surface tension of the intermediate material with respect to the glass film surface or by the restoring pressure or the surface tension of the glass film with respect to the intermediate material. The restoration pressure applied by the intermediate material and the intermediate material layer in accordance with the pre-stress is 1 to 200 kPa (kilopascals). A third factor for the fixing of the glass films in the glass roll is the adhesion of the intermediate material to a very smooth glass surface. The adhesion is increased by the pressure of the intermediate material against the glass film surface or by the pressure of the glass film against the intermediate material.

Since the intermediate material forms a pressure-fit bond by static friction with the glass film in the glass roll, the glass film is fixed in the glass roll.

The greater the tensile stress of the intermediate material and / or the glass film upon winding, the less air is wound together as it cools, which prevents the vibration of the glass film layers in the glass roll in the glass film combination. A prescribed winding tightness is achieved in accordance with the pre-stress or tensile stress at which the intermediate material and / or the glass film is wound. The larger the winding tightness, the better the glass film is fixed within the glass roll.

Also, the unevenness in the glass film is compensated by the compressible intermediate material. As a result, an increase in stress causing breakage of the glass film can be prevented. The non-planar is for example "warp" (a larger waveform frozen by stress) and "waviness" (microfine of the surface) due to different thickness profiles.

In addition, since the particulate inclusion of the contamination between the glass film layers is absorbed by the compressible intermediate material, the stress peaks between the particles and the glass film can be compensated and damage to the glass film can be prevented. The particles are particles which have already existed on the surface of the glass film or on the surface of the intermediate material before the roll-up of the glass film.

The glass roll according to the present invention is also characterized by the fact that due to the fixing of the glass film layers by the restoring pressure exerted on the glass film by the high winding tightness and the intermediate material the clearness of the glass roll against the penetration of contaminants between the individual layers of the glass film Side sealing can be achieved.

In one embodiment, the intermediate material layers may project laterally beyond the glass film edge to protect the glass film edge from impact. In this case, the protrusion is restricted so that the intermediate material layers do not get caught when winding the glass roll.

In another embodiment of the present invention, instead of the intermediate layer extending over or beyond the width of the sleeve, a narrower intermediate layer or multiple intermediate or intermediate layer sheets are provided, as described above, The width of the individual intermediate layer sheets is much smaller than the width of the rolled glass sheet. This is the subject of claim 17. According to claim 17, it is required that the glass film has a first width, each of the intermediate material sheets has a second width, and the second width B2 is much narrower than the first width B1.

The width of the interlayer sheets does not actually affect friction. As the width of the intermediate layer sheets decreases, the surface tension automatically increases. The surface tension is multiplied by the working surface to provide a radial force, which provides friction with a static coefficient of friction. Further, by using a plurality of glass sheets, the geometric non-uniformity, e.g., wave and warp, can be compensated very easily. Alternatively, the non-uniformity of the entire surface of the intermediate layer can be absorbed only by the compressibility of the intermediate layer material. To this end, a very large force is required in part depending on the intermediate layer material, which force is not transmitted to the glass sheet and can not be applied to the intermediate layer material due to the glass thickness and hence the stiffness lost. Since the force is always in equilibrium, the stress is formed in the glass roll at a corresponding magnitude according to the hardness of the intermediate layer material. Thus, in the case of an uncompressible intermediate layer material, such as a clean room film, the total stress must be absorbed by the glass sheet.

In addition, there is a possibility that narrow intermediate layer sheets can be used. This has the advantage that the glass sheet is spaced from one glass layer to the next glass layer, but geometric irregularities can be prolonged in the use of a number of narrower intermediate layer sheets, right or left of the narrower intermediate layer sheet or in the interspace.

A specific curvature of one side of the glass sheet is also possible. In such a glass sheet, a neutral line is defined. The neutral line is a line along the glass sheet that is free of compressive and tensile forces when the glass sheet is wound exactly at the same spacing of glass sheet edges per wound layer. Since the glass sheet with curvature can not be expanded and compressed compared to other sheet-type windable materials, conical spacing or funnel-shaped sleeves between the glass layers are provided when winding such glass sheet, and the inner surface of the funnel- Of the total compressive load of the edge, which generally causes damage and breakage of the edge.

To solve this problem, since at least one intermediate layer sheet is placed in the center of the glass sheet along the neutral line, the neutral line can be wound somewhat compactly on its left and right over the width of the intermediate layer. It is particularly preferred to arrange the narrow intermediate sheet in the middle of the width of the glass sheet in this manner because the glass sheets often do not have parallel edges when the glass sheets come out of the drawing process of the down- , For example a radius of one kilometer. When these glass sheets are rolled to form rolls, there is a problem that the sheets roll up in funnel form. The surface of the sheet, that is, the surface facing the outer surface of the curved sheet is loosely wound, and the other surface, that is, the surface facing the inner surface, is tightly wound. As a result, the total pressure of the glass roll is applied to the inner edge, which can cause breakage or damage of the glass edge. To prevent this, only one narrow strip, which can be formed as a single or multiple strips, is provided as an intermediate layer and the strips are preferably centrally located, so that different spacing Can be formed freely and the pressure is applied to the center of the intermediate material layer. The holding force to prevent the stretching material of the glass roll is provided at the center of the glass roll and not at the edge. Otherwise, cracking or breakage can easily occur at the edge. By inserting the middle layer in the middle, glass rolls or glass sleeves have sufficient stability and breaking strength, especially in glass sheets with edges that are not parallel.

The width of the intermediate layer is much smaller than the width of the glass layer or glass sheet and is 10 to 70% of the width of the glass sheet, preferably 30 to 50% of the width of the glass sheet.

For use of the narrow intermediate layer material, all of the following materials which can also be used for a single layer are used. They can be used in all widths, for example in the range from 2 mm to 600 mm, and in any number, for example from 2 to 300 pieces. The width of the individual intermediate layer may be, for example, 0.1% to 10% of the total width of the glass layer. Ropes, yarns, powders and granules are also possible. Further, if the intermediate layer is formed as an intermediate layer sheet, the width of the intermediate layer sheet may vary according to the extension of the sheet. That is, it can be reduced or increased. The width of the intermediate layer sheet need not be the same throughout the entire sheet length.

The intermediate material is any compressible material suitable as an intermediate material. In particular, the thickness must correspond to an economical application for the production of glass rolls. Particularly preferred is a porous material having an apparent density lower than the density of a flexible foam material, such as a foam film (a structural material). It can be a uniform foam material with a nearly constant apparent density across the cross-section, or it can be an integral foam material. Such integral foam materials have different bulk density distributions across the cross-section. The apparent density decreases toward the center of the cross section. The intermediate material layer of such a foam material has the desired flexural behavior and good adhesion to a nearly porous surface.

As intermediate materials, compressible materials such as foam materials, embossed or otherwise structured paper, paperboard, plastic film or metal film in loose form or in track form as powder, flakes or particles are suitable. Preferably the material is a compressible paperboard or a foam film made of, for example, a polyolefin foam material, in particular a foam film made of a cross-linked polyolefin foam material, or a foam film made of polyethylene or polyurethane. The foam material is preferably a closed cell. Also suitable are compressible materials such as cargo planes or synthetic leather.

Also loosely or fixedly bonded multilayer intermediate materials are suitable, in which case preferably the material in contact with the glass film is given to the surface of the assembly and a compressible material is given in the core of the assembly. The core material may also be composed of multiple layers. The glass film contact material may be disposed only on one surface of the intermediate material. The material of the surface is adjusted to the contact with the glass film surface. In this case, particularly good chemical suitability is taken into account, so that a residue of intermediate material such as silicon does not remain on the glass surface or ion diffusion does not occur. Also, the change in the aging process of the glass film surface across the surface must be prevented from occurring differently, which may be caused by an intermediate material which is not particularly favorable for subsequent coating processes, for example structured and heavily porous. The material in the core of the intermediate material combination is selected with respect to the action of good compression action and preferably further good restoring force.

The thickness of the intermediate material is preferably less than or equal to 2 mm, more preferably less than or equal to 1 mm, and particularly preferably less than or equal to 0.5 mm. In embodiments where the glass sheet has a thick edge in the side edge, i. E. The edge area, the intermediate material may be thicker and up to 8 mm thick. To compensate for the need for a thicker edge region for a thinner glass film across the width, multiple layers of intermediate material can be rolled up. The first intermediate material layer may be disposed between the glass film layers within the width of the thin glass film transverse section over and over the entire width of the glass film and / or one or more of the narrower intermediate material layers below it.

Intermediate materials having static friction (F _s ) in the range of 0.15 to 10 N, preferably 1 to 10 N, in cooperation with the fire-polished glass surface are preferred. The static friction refers to the peak of the force to be overcome, so that the intermediate material is moved relative to the glass surface.

Also preferred is an intermediate material having a frictional force (F _D ) in the range of 0.15 to 5 N, preferably 0.2 to 2.5 N, particularly preferably 1 to 2.5 N in interaction with the fire-polished glass surface. The frictional force refers to the force averaged over the test distance after overcoming traction, which force is needed for relative movement between the intermediate material and the glass surface.

The values for static friction (F _s ) and frictional force (F _D ) were measured on a Schenk-Trebel electromechanical universal testing machine at 23 ° C and 50% relative atmospheric humidity according to DIN 50 014 with a normal force of 1.96 N Measured according to EN ISO 8295.

In another embodiment according to the invention, at least one of the sides of the glass film is coated with a plastic layer, in particular a polymer layer.

In a particular embodiment, the plastic layer forms an intermediate material. This has the particular advantage that the roll-up and unwinding becomes significantly simpler, because the material separated from the glass film need not be provided to the other rolls or it does not need to be received separately from the rolls when released.

The present invention also relates to a method of manufacturing a winding core comprising the steps of providing a glass film, a winding core and a compressible intermediate material, winding at least one inner layer of the intermediate material on the winding core, Winding the glass film and the intermediate material on the winding core so that the layer is wound, wherein the intermediate material and / or the glass film are wound with tensile stress acting in the longitudinal direction, the tensile stress causing the compression of the intermediate material And a step of fixing the glass film end to the glass roll.

The winding cores can be made of any stable material with sufficient flexural stiffness and compressive strength. The intermediate material is preferably provided by being wound on a roll. The glass film is provided as an infinite sheet from a manufacturing method such as a down-draw method or an overflow-down-draw-fusion method, or is provided as a glass roll by being rolled up.

First, one or more layers of intermediate material are wound on the winding cores to create a spandrel between the arriving intermediate material and the already rolled intermediate material. The beginning of the length of the glass film sheet to be rolled up is introduced into the span drel, and the layer is rolled up alternately with the intermediate material. Thus, the glass film is covered by the intermediate material on two surfaces, preferably on the entire surface. In this case, the intermediate material is fed so as to be wound on the glass roll with a specific preliminary stress or tensile stress acting in the longitudinal direction thereof, and rolled up by controlling the speed of unwinding the intermediate material supply roll and the speed of rolling up the glass roll in proportion to each other . The intermediate material feed rolls are each braked accordingly. The tensile stresses are measured and correspondingly controlled by sensors, respectively. When the glass film is separated from the roll, the glass film may be fed and rolled up to be wound on the glass roll with a specific pre-stress or tensile stress acting in its longitudinal direction. In this case, both can be supplied and rolled up to wind on the glass roll with both pre-stress or tensile stress acting in their longitudinal direction, i.e., the intermediate material and the glass film. In each case, the tensile stress is set such that a given winding tightness is achieved and the intermediate material is compressed.

If the end of the length of the glass film sheet to be rolled up lies, preferably one or more layers of the intermediate material are wound around the glass roll for fixing of the outer glass film layer and the glass film end. Additionally or alternatively, outer covering of the glass roll with other materials, such as padded outer protective film, paper or adhesive sheet or fixing sheet, can be made. It is important here that the topmost glass film layer is securely fixed in order to prevent loosening of the glass film layers and to maintain the restoring pressure of the intermediate layers.

 The invention also encompasses the use of a compressible material, in particular a foam material film, as an intermediate material between glass films in a glass roll, said intermediate material being wrapped alternately with the glass film and wound on the winding core in at least two respective layers And the intermediate material layers can fix the glass film layers. In particular, such a foam material film is comprised of a polyolefin foam material, particularly a cross-linked polyolefin foam material or polyethylene or polyurethane.

The present invention provides a simple and compact glass roll with lateral flanges and other devices and packaging materials that can be omitted and with great protection against roll-up glass films, because the glass roll on the winding core is self-supporting and stable do. In particular, the glass roll according to the invention permits vertical or inclined transport with a vertical or inclined axis, which allows a great degree of freedom during handling of the glass roll. Typically, such glass rolls have a width of 300 to 1500 mm and an outer diameter of 300 to 1000 mm. The weight of these rolls is about 30 to 200 kg.

For longer transport or storage, the glass rolls can be packaged in a protective casing of the overall packaging as required for transport.

The present invention provides a glass roll that does not have the disadvantages of the prior art and prevents movement or vibration of the glass roll with great protection against roll-up glass.

The following detailed examples illustrate the present invention in detail.
1 is a cross-sectional view of a glass roll according to the present invention.
Figure 2 is an illustration of a roll-up device for the production of a glass roll according to the present invention.
Fig. 3 is an illustration of an alternative roll-up device for Fig. 2 for the production of a glass roll according to the present invention. Fig.
4A and 4B are longitudinal cross-sectional views of a wound glass roll.
5 is a graph showing weight and friction as a function of the number of layers wound in one embodiment.
6a is a plan view of a glass sheet designed in one plane, with curvature of the edge.
Figure 6b is a cross-sectional view of a glass roll with a rolled up intermediate layer having a width less than the width of the glass roll, and the glass sheet may have a curvature as in Figure 6a in that plane.

The three intermediate material layers are rolled up on the winding core 2 in the exemplary glass roll 1 as shown in Figure 1 to form the inner intermediate material layer 41. [ Subsequently, n glass layers 6 and n intermediate material layers 4 are placed on the glass roll 1 since the glass film and the intermediate material are alternately rolled up in a layered manner. The outer intermediate material layer 42 is formed reinforced by a further intermediate material layer. One or a plurality of fixing sheets 12 are mounted around the glass roll 1 from outside in order to fix the outer intermediate material layer 42 to the original unwinding. The glass rolls 1 are compact and prestressed and the glass film layers 6 are applied to the glass rolls 6 at a restoring pressure of 50 to 100 kPa, Respectively.

For the production of the glass roll 1 according to Fig. 1, for example, a roll-up mechanism according to Fig. 2 is applied. In the unillustrated down-draw system, an endless glass film sheet 5 having a width of 500 mm and a thickness of 50 탆 is molded and drawn. The glass film sheet is guided by the belt conveyor 11 to the pair of deflecting rollers 8 and 10, and fed to the wound glass roll 1 from the pair of rollers. 3 of the intermediate material 3, on which a winding core 2 made of a cardboard with a core diameter of 400 mm is mounted and on which the inner intermediate material layer 41 is first formed, Layer is rolled up. The intermediate material 3 is a foam material film made of a polyolefin foam material of cross-linked closed cell with a thickness of 1 mm, for example a foam material film sold by Alveolit TA 1001 of Sekisui Alveo AG, Luzern. The intermediate material (3) is unwound from the intermediate material supply roll (7). The intermediate material is guided around the intermediate material direction changing roller 8 and wound on the winding core 2, and the winding core rotates in the opposite direction to the intermediate material supply roll 7. [

Since the beginning of the sheet of the glass film 5 is introduced into the spandrel formed of the intermediate material 3 arriving with the intermediate material layers 41 after the roll up of the three inner intermediate material layers 41, The film is buried between the layers of the intermediate material 3 accompanied by the glass roll 1 or the driven winding core. The glass film 5 and the intermediate material 3 are now alternating layers and rolled up into n layers, respectively, until the total glass film length of 1000 m is rolled up on the glass roll 1.

Subsequently, the length of the glass film is cut. For this purpose, mechanical scribing and / or separation using a laser, for example a laser scribing method, is applied. In the latter case, the bundle of laser beams, usually the CO ₂ laser beam, is heated along a line exactly defined by the glass, and the cold jet of the immediately following compressed air or air liquid mixture causes the glass to crack along a predetermined edge A thermal stress is generated in the glass. Subsequently, a plurality of, at least two two-layer intermediate materials 3 are wound around the glass roll to form the outer intermediate material layer 42. Unlike the automatic roll-up of the outer intermediate material layers 42, they are fixed by three fixing sheets 12. [ These prevent the decompression of the entire glass roll 1, so that the entire glass roll can be safely stored and transported together with the firmly fixed glass film layers 6. [ The glass roll has an outer diameter of about 650 mm and a weight of about 110 kg.

The intermediate material is wound on the winding core 2 or on the glass film layer 6 under a pre-stress or tensile stress acting in the longitudinal direction, On top and / or top of the individual glass film layer 6 as a single layer. To control the pre-stress or tensile stress, a sensor 9 is connected to the intermediate material direction switching roller 8, which is connected to a driven glass roll 1 or winding core and a braked intermediate material feed roll 7 The tensile force of the intermediate material 3 is measured. For example, the sensor 9 is a tension sensing roller that measures the pressure given by the winding of the intermediate material around the roll 8 in accordance with the braking action of the braking device 13. The intermediate material supply roll 7 is braked by the braking device 13 to an extent necessary for setting the required tension force according to a predetermined set value. The tensile force in the longitudinal direction causes a pre-stress acting on the finally rolled-up glass film layer when winding the intermediate material (3). Since the intermediate material applies a restoring pressure to the glass film layers 6 in the glass roll 1 while trying to expand again, the glass film layers are fixed in the glass roll. At the same time, the intermediate material 3 is pulled by the tensile force. While the length is about to shrink again, the intermediate material is applied to the glass film layers 6 in the glass roll 1, so that the glass film layers are fixed in the glass roll.

In another embodiment according to the present invention, a glass film is provided from a glass film supply roll and supplied to the glass roll 1 to be wound through a pair of deflection rollers 8 and 10. Here too, the winding core 2 or the wound glass roll 1 is mounted on a driven device. The apparatus not only pulls the intermediate material 3 from the intermediate material supply roll 7 in this embodiment but also pulls the glass film 3 from the glass film supply roll. In this embodiment, the glass film 3 is wound on the glass roll 1 with a pre-stress or a tensile stress, for which a braking device is provided in the unwinding device for the glass film feed roll and a sensor is provided in the glass film orientation roller. The sensor measures the tensile force of the glass film. The unrolling device for the glass film feed roll by the control device is braked to such an extent that the necessary tension is set. This ensures that the compression of the intermediate material 3 in the glass roll 1 and the prescribed winding tightness are reliably set so that the glass film layers 6 are securely fixed in the glass roll 1. [

Fig. 3 shows an alternative roll-up device for Fig. 2 for the production of a glass roll according to the invention. Here, a roll-up device in the other direction of the glass roll is preferable, which is preferable in the provision of the glass film according to the conditions. In this embodiment, an additional intermediate material feed roll 71 is provided to provide a spindle for the introduction of the glass film after provision of the inner intermediate material layer 41. The intermediate material of the two supply rolls 7 and 71 is wound on the winding core 2 to form the intermediate material layer 41. [ Since the beginning of the sheet of the glass film 5 is introduced into the span drale between the two intermediate material webs, the glass film is carried on the glass roll 1 or the driven winding core to form the layers of the intermediate material 3, 31 Respectively. The intermediate material 3 is a layer alternating with the glass film 5 so that a total glass film length of 1000 m is formed on the glass roll 1 Up to n < / RTI >

Subsequently, the length of the glass film is cut. A plurality of, at least two two-layer intermediate materials (3) are wound around the glass roll for the formation of the outer intermediate material layer (42). Unlike the original roll-up of the outer intermediate material layers 42, they are wound with a fixed adhesive sheet. These prevent the decompression of the entire glass roll 1, so that the entire glass roll can be safely stored and transported together with the firmly fixed glass film layers 6. [ The glass roll has an outer diameter of about 650 mm and a weight of about 110 kg.

The intermediate material is wound around the winding core 2 or the glass film layer 6 under the pre-stress or tensile stress acting in the longitudinal direction so that the intermediate material 3, And / or on top of the individual glass film layer 6. [ To control the pre-stress or tensile stress, a sensor 9 is connected to the intermediate material direction switching roller 8, which is connected to a driven glass roll 1 or winding core and a braked intermediate material feed roll 7 The tensile force of the intermediate material 3 is measured. The intermediate material supply roll 7 is braked by the braking device 13 to an extent necessary for setting the required tension force according to a predetermined set value. The tensile force of the intermediate material 31 is set according to the rotational speed of the winding core 2 by the braking device 131 acting on the intermediate material feed roll 71. [ The tensile force in the longitudinal direction causes a pre-stress acting on the finally rolled up glass film layer when winding the intermediate material (3, 31). During the attempt to be re-inflated, the trial adds the restoring pressure to the glass film layers 6 in the glass roll 1, so that the glass film layers are fixed in the glass roll. At the same time, the intermediate material 3, 31 is pulled by the tensile force. During the attempt to shrink the length again, the above-mentioned attempt is made by placing an additional force on the glass film layers 6 in the glass roll 1, whereby the glass film layers are fixed in the glass roll.

4A and 4B show a sleeve 1000 in which a glass sheet is rolled up on a drum 1100 as a winding core with a radius r with intermediate layers. In this case, FIG. 4A shows a vertically erected sleeve 1000 and FIG. 4B shows a longitudinal section view of the sleeve 1000. Sleeve 1000 consists of a plurality of glass layers 1110 separated from adjacent layers by intermediate layer 1020, respectively. The thickness of the glass layer is 0.05 mm in one embodiment and the thickness of the intermediate layer is 0.5 mm.

The radial direction force acting on the roll is denoted by FR, and the weight of the roll is denoted by FG. The magnitude of the radial force is substantially determined by the pre-stress (FV) provided by the intermediate layer, and the pre-stress causes the glass sleeve to be wound. The number n of wound layers and the static friction coefficient mu, as well as the number of turns of the winding 1000, in order to prevent the sidewall 1200 of the sleeve from moving in parallel or axially with respect to the axis, The radial direction force FR that determines the friction (FF) between the material and the core must be greater than the weight FG.

Knowing the parameter (μ) and the number of layers (n) for the coefficient of static friction, the friction (FF) between the wound material and the winding core is given by:

For the weight in the above example, the following equation is given:

Where t1 is the glass thickness, n is the number of wound layers, t2 is the thickness of the intermediate layer, p is the glass specific gravity and g is the g-acceleration. If the friction FF has to be larger than the weight of the sleeve, since FV = FR, the preliminary stress can be determined very simply when the number n of wound layers is predetermined.

Figure 4b shows a longitudinal section of the sleeve, in which the roll radius of the winding core is denoted by r, the pre-stress at which the sleeve is rolled up is denoted by FV, and the pre-stress determines the radial directional force in the sleeve. The pre-stress according to the invention is preferably introduced into the intermediate layer.

5, the pre-stress FV = 0.7 ^{Newton, ρ = 2.3 kg / dm 3} , the force (FR) given by the formula for an embodiment with a glass layer thickness t1 = 0.05 ㎜ and an intermediate layer thickness t2 = 0.5 ㎜ the Newton and FG are presented as Newton. In this case, the static friction coefficient mu = 1.1 and the roll radius r = 200 mm. Glass material width b = 400 mm.

As shown in Fig. 5, the weight is always smaller than the friction FF given from the radial direction force FR in the selected parameter FG. The radial force is set by preliminary stress.

In the embodiment shown in Fig. 5, the friction between the FG curve and the friction FF is matched at about 180 to 190 layers, so that the static friction between the layers in more than 200 layers compensates for the weight, It is insufficient to ensure that the material does not appear.

Although the embodiments presented herein are given for a particular glass-Schott AG AF32 eco- and for an exemplary pre-stress FV = 0.7 Newton, it is possible to obtain from the above formula any number of glass layers for each glass type and pre- It is possible to determine what preliminary stress is needed to prevent the elastic material from appearing in the stretching material of the glass sleeve or from the predetermined number of glass layers.

Alkali-free glass AF32 eco has the following composition in weight percent.

SiO ₂ 61

Al ₂ O ₃ 18

B ₂ O ₃ 10

CaO 5

BaO 3

MgO 3

The transformation temperature (Tg) of the glass is 717 캜. Its density is 2.43 g / cm < 3 >. The secondary average roughness (Rq) of the upper and lower surfaces of the glass film is 0.4 to 0.5 nm. That is, the surface is very smooth.

6A and 6B show an embodiment in which a plurality of glass layers 2100 are wound on a winding core 2000 about an axis A. In FIG. The intermediate layers 2130 between the individual glass layers 2100 do not extend over the entire width B of the glass sleeve but the width B2 of the intermediate material or intermediate layer 2130 is greater than the width B1 of the glass layers. It is much shorter than that.

The configuration of the sleeve is shown in Figure 6B. 6A shows a top plan view of a unrolled glass sheet 2110 that forms a plurality of glass layers 2100 as they are wound on a winding core 2000. FIG. As shown in FIG. 6A, the edges 2120.1 and 2120.2 of the glass sheet 2110 are not parallel and have a constant curvature. The inner edge 2120.1 may be represented, for example, by a radius of curvature RB1, and the outer surface may be represented by a radius of curvature RB2. The radius of curvature RB1, RB2 is very large and ranges, for example, from 1 to several kilometers. In general, the radius of curvature RB1 of the inner edge 2120.1 is less than the radius of curvature RB2 of the outer edge 2120.2. 6B, the spacing of the individual glass layers without the compensating intermediate layer at the outer edge 2120.2 is generally greater than at the inner edge 2120.1, Big. That is, the pressure in the sleeve is maximum at the inner edge 2120.1. The effect can be compensated by the embodiment shown in FIG. 6A, in which the middle layer 2130 is at the center of the glass sheet 2100 with a width much smaller than the width of the glass layer, and the outer edge 2120.2, And at the inner edge 2120.1, a substantially free separation of the individual glass layers to the left and right of the intermediate layer and hence a stress-free winding is obtained.

Although a single intermediate layer sheet is shown as an intermediate layer in Figure 6b, a number of said intermediate layers may be provided to cover the entire width B1 of the glass. Of course, in order to compensate for warped glass sheets, a single intermediate layer can be provided at the center.

As described above, the geometrical irregularities of the glass surface, e.g., wave and warp, can be easily compensated for by the intermediate layer extending only over a portion of the entire glass layer width B1, Lt; RTI ID = 0.0 > partially < / RTI >

The present invention is not limited to the combination of the above-mentioned features, and a person skilled in the art can use the entire features of the present invention, if desired, in any combination or alone without departing from the scope of the present invention.

1 glass roll
2 winding core
3, 31 intermediate material
4 intermediate material layer
41 Inner intermediate material layer
42 outer intermediate material layer
5 glass film
6 glass film layer
7, 71 intermediate material supply roll
8 Middle Material Orientation Roller
9 sensor
10 Glass Film Orientation Roller
11 Belt conveyor
12 fixed seat
13, 131 Brake device
1000 sleeves
1020 intermediate layer
1110 glass layer
1200 side wall
2000 winding core
2100 glass layer
2110 glass sheet
2120.1, 2120.2 internal edge / external edge
2130 intermediate layer
The present invention includes aspects described in the following sentence, which aspects are part of the detailed description, but are not intended to be limiting.
sentence
1. A glass roll comprising at least one glass film and an intermediate material, which are rolled up into at least two layers on a winding core,
Characterized in that the glass film layers are fixed by intermediate material layers.
2. The glass roll according to statement 1, wherein said glass film layers are fixed by a compressed intermediate material.
3. The glass roll of statement 2, wherein said glass film layers are fixed by a compressed intermediate material, said intermediate material applying restoring pressure against said glass film layers.
4. A glass roll according to any one of the preceding sentences, wherein the intermediate material is a foam material film.
5. The glass roll of statement 4, wherein said intermediate material is a polyolefin foam material, especially a cross-linked polyolefin foam material.
6. A glass roll according to any one of statements 1 to 3, wherein said intermediate material is an embossed or otherwise structured paper or cardboard.
7. The glass roll according to any of the preceding sentences, wherein the glass film has a thickness of at most 350 μm, preferably at most 100 μm, more preferably at most 50 μm, particularly preferably at most 30 μm.
8. The glass roll according to any of the preceding sentences, wherein the glass film has a thickness of at least 5 mu m, preferably at least 10 mu m, particularly preferably at least 15 mu m.
9. The glass roll according to any one of the preceding sentences, wherein the glass film has a fire-polished surface on at least one surface of both sides thereof.
10. The glass film according to any one of the preceding sentences, wherein at least one surface of both sides of the glass film has a secondary average roughness of at most 1 nanometer, preferably at most 0.8 nanometer, particularly preferably at most 0.5 nanometer (RMS) Rq.
11. The glass film according to any one of the preceding sentences, wherein the glass film has an average surface roughness Ra of at most 2 nanometers, preferably at most 1.5 nanometers, particularly preferably at most 1 nanometer, on at least one surface of both sides thereof ≪ / RTI >
12. The glass roll according to any one of the preceding sentences, wherein at least one of the sides of the glass film is coated with a plastic layer, in particular a polymer layer.
13. The glass roll of statement 12, wherein said plastic layer forms an intermediate material.
14. A glass roll as in any one of the preceding sentences, wherein the intermediate material is formed from a plurality of layers of intermediate material.
15. The glass roll of statement 14, wherein said plurality of intermediate material layers have different widths.
16. The glass roll of any one of the preceding sentences, wherein the intermediate material layers project laterally past the glass film layer.
17. The method of any one of the preceding sentences, wherein the fixation of the glass film layer by the intermediate material layer is performed in a range of 0.15 to 10 N, preferably 1 to 10 N, which acts between the glass film layer and the intermediate material layer Is made by the static friction F _s of the glass roll.
18. The method of any one of the preceding sentences, wherein the fixation of the glass film layer by the intermediate material layer is performed at a temperature of from 0.15 to 5 N, preferably from 0.2 to 2.5 N, particularly preferably formed by a friction force F _D in the range of 1 to 2.5 N, a glass roll.
19. A method of making a glass roll according to any one of the preceding sentences,
a) providing a glass film, a winding core and a compressible intermediate material,
b) winding at least one inner layer of intermediate material on the winding core,
c) winding the glass film and the intermediate material on the winding core such that the glass film is wound on the winding core alternately with the intermediate material, wherein the intermediate material and / or the glass film are oriented in the longitudinal direction Winding, said tensile stress causing compression of the intermediate material,
d) fixing the glass film end on the glass roll.
20. The method of claim 17, wherein the fixing of the glass film end is by at least one outer layer of the intermediate material.
21. An intermediate material between glass films in a glass roll, wherein the intermediate material is alternately superimposed with the glass film and can be wound on the winding core in at least two layers, and the glass film layers can be fixed by an intermediate material layer Use of a compressible material, especially a foam material film.

Claims (43)

A glass roll, comprising at least one glass film and an intermediate material, wherein the glass film and the intermediate material are superposed on at least two layers on a winding core, wherein the glass film layers are fixed to the intermediate material layer,
Wherein the glass film comprises a fire-polished surface on at least one surface of both sides thereof, the glass film having a maximum of at least 1 nm, preferably at most 0.8 (RMS) Rq of at most 0.5 nm, most preferably at most 0.5 nm. The glass roll according to claim 1, wherein the glass film layers are fixed by a compressed intermediate material. The glass roll according to claim 2, wherein the glass film layers are fixed by a compressed intermediate material which applies a restoring pressure against the glass film layers. The glass roll according to any one of claims 1 to 3, wherein the intermediate material is a foam material film. 5. The glass roll of claim 4 wherein said intermediate material is a polyolefin foam material, especially a cross-linked polyolefin foam material. A glass roll according to any one of claims 1 to 3, characterized in that the intermediate material is embossed or otherwise structured paper or paperboard. The glass film according to any one of claims 1 to 6, characterized in that it has a thickness of at most 350 μm, preferably at most 100 μm, more preferably at most 50 μm, particularly preferably at most 30 μm As a glass roll. A glass roll as claimed in any one of the preceding claims, characterized in that the glass film has a thickness of at least 5 μm, preferably at least 10 μm, particularly preferably at least 15 μm. 9. Glass film according to any one of claims 1 to 8, characterized in that the glass film has an average of at most 2 nanometers, preferably at most 1.5 nanometers, particularly preferably at most 1 nanometer, And a surface roughness Ra. 10. The glass roll according to any one of claims 1 to 9, characterized in that at least one side of the sides of the glass film is coated with a plastic layer, in particular a polymer layer. 11. The glass roll of claim 10, wherein the plastic layer forms the intermediate material. 12. The glass roll according to any one of claims 1 to 11, characterized in that the intermediate material is formed of a plurality of intermediate material layers. 13. The glass roll of claim 12, wherein the plurality of intermediate material layers have different widths. 14. The glass roll according to any one of claims 1 to 13, wherein the intermediate material layers protrude sideways past the glass film layers. 15. A method according to any one of the preceding claims, wherein the fixing of the glass film layers by the intermediate material layers is carried out at a temperature of between 0.15 and 10 N, 10 N range of static friction F _S , and / or the fixing of the glass film layers by the intermediate material layers is between 0.15 and 5 N, preferably between 0.15 and 5 N, acting between the glass film layers and the intermediate material layers And a frictional force F _D in the range of 0.2 to 2.5 N, particularly preferably in the range of 1 to 2.5 N. 16. The method according to any one of claims 1 to 15,
b Glass material width
r Roll radius (core)
t1 Glass thickness
t2 intermediate layer thickness
μ static friction coefficient
ρ glass density
And in the previously known number of winding layers n, the pre-stress FV is selected such that the friction FF is greater than the weight FG of the sleeve. At least one glass film and an intermediate material, wherein the glass film and the intermediate material are superposed on at least two layers on a winding core, wherein the glass film layers are fixed to the intermediate material,
Wherein the intermediate material comprises at least one intermediate layer sheet or intermediate layer as an intermediate material layer, the glass film having a first width (B1) and the intermediate layer sheet having a second width (B2) And the width (B2) is much narrower than the first width (B1). The method of claim 17, wherein the second width (B2) of the intermediate layer sheet or intermediate layer is in the range of 10% to 70% of the first width (B1) of the glass film, Is in the range of 30% to 50% of the width (B1). The glass roll according to claim 17 or 18, wherein the width (B2) of the intermediate layer sheet or the intermediate layer is in the range of 2 mm to 600 mm. 20. A glass roll according to any one of claims 17 to 19, characterized in that the number of said intermediate layers or said intermediate layer sheets lies in the range from 1 to 300, preferably from 10 to 100. 21. A glass roll according to any one of claims 17 to 20, wherein the intermediate layer sheets or the intermediate layers are in the form of a line or a seal. 22. A method according to any one of claims 17 to 21, wherein the intermediate layer sheets or intermediate layers are arranged such that, over a first width of the glass roll, geometrical irregularities in the surface of the glass film are widely compensated in the width direction And the glass rolls are arranged in the circumferential direction. 23. The glass roll of claim 22, wherein the geometrical irregularity is a wave and / or warp on the surface of the glass film. 24. Glass roll according to any one of claims 17 to 23, characterized in that the intermediate material is a compressed intermediate material. 25. The glass roll of claim 24, wherein the glass film layers are fixed by the compressed intermediate material, and the compressed intermediate material applies a restoring pressure against the glass film layers. 26. The glass roll according to any one of claims 1 to 25, wherein the intermediate material is a foam material film. 27. The glass roll of claim 26, wherein the intermediate material is a polyolefin foam material, particularly a cross-linked polyolefin foam material. 26. A glass roll according to any one of claims 17 to 25, wherein said intermediate material is embossed or otherwise structured paper or paperboard. 29. The film according to any one of claims 1 to 28, characterized in that the glass film has a thickness of at most 350 mu m, preferably at most 100 mu m, more preferably at most 50 mu m, particularly preferably at most 30 mu m As a glass roll. 30. Glass roll according to any one of the preceding claims, characterized in that the glass film has a thickness of at least 5 mu m, preferably at least 10 mu m, particularly preferably at least 15 mu m. 32. A glass roll according to any one of claims 1 to 30, wherein the glass film comprises a fire-polished surface on at least one surface of both sides thereof. 32. The film according to any one of claims 1 to 31, wherein the glass film has a secondary average roughness of at most 1 nm, preferably at most 0.8 nm, particularly preferably at most 0.5 nm at at least one surface of both sides thereof (RMS) < RTI ID = 0.0 > Rq. ≪ / RTI > 32. The film according to any one of claims 1 to 32, wherein the glass film has an average surface roughness Ra of at most 2 nm, preferably at most 1.5 nm, particularly preferably at most 1 nm at at least one surface of both sides thereof Of the glass roll. 34. A glass roll according to any one of claims 1 to 33, characterized in that at least one side of the sides of the glass film is coated with a plastic layer, in particular a polymer layer. 35. A glass roll according to claim 34, wherein said plastic layer forms said intermediate material. 37. A glass roll according to any one of claims 1 to 35, characterized in that the intermediate material is formed of a plurality of intermediate material layers. 37. The glass roll of claim 36, wherein the plurality of intermediate material layers have different widths. 38. A glass roll according to any one of the preceding claims, wherein said intermediate material layers do not protrude laterally past said glass film layers. 39. The method according to any one of claims 1 to 38, wherein the fixing of the glass film layers by the intermediate material layers is carried out at a temperature of between 0.15 and 10 N, 10 N is made by a traction F _S of range, and / or 0.15 to act between the glass film layers and the intermediate material layers to about 5 N, preferably 0.2 to 2.5 N, particularly preferably 1 to 2.5 N And the frictional force F _D of the range. 40. The process according to any one of claims 1 to 39,
b Glass material width
r Roll radius (core)
t1 Glass thickness
t2 intermediate layer thickness
μ static friction coefficient
ρ glass density
And in the previously known number of winding layers n, the pre-stress FV is chosen such that the friction FF is greater than the weight FG of the sleeve. 40. A method of producing a glass roll according to any one of claims 1 to 40,
a) providing a glass film, a winding core and a compressible intermediate material,
b) winding at least one inner layer of the intermediate material on the winding core,
c) winding the glass film and the intermediate material on the winding core such that the glass film is wound on the winding core alternately with the intermediate material, wherein the intermediate material and / or the glass film are oriented in the longitudinal direction Wherein said tensile stress causes compression of said intermediate material, and
d) fixing the end of the glass film to the glass roll. 40. The method of claim 39, wherein the fixing of the glass film end is by at least one outer layer of the intermediate material. Wherein the intermediate material is wrapped alternately with the glass film to wind on the winding core in at least two layers and the glass film layers can be fastened by the intermediate material layers as the intermediate material between the glass films in the glass roll, , In particular the use of a foam material film.

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